I got a box of used parts a edge juice w attitude, exhast, banks ram air system, and there was some block off plates. So I pulled the egr valve stuck the block off plates under the egr valve and bolted it back on. I have two more identical plates. What would they be for? There was a washer with the center welded shut that I clamped on the egr cooler side and took the pipe out. I didnt get any directions for the delete so Im wingin it. Also when the eb is on it makes a wield whistling sound now?